| 摘要 |
A VALVE CONTROL APPARATUS (1) FOR AN INTERNAL COMBUSTION ENGINE (3) IS PROVIDED WHICH IS CAPABLE OF OPTIMALLY SETTING THE CLOSING TIMING OF AN ENGINE VALVE ACCORDING TO OPERATING CONDITIONS OF THE ENGINE (3) WHILE SUPPRESSING AN INCREASE IN THE INERTIAL MASS OF THE ENGINE VALVE TO THE MINIMUM, THEREBY ATTAINING IMPROVEMENT OF FUEL ECONOMY, AND REALIZATION OF HIGHER ENGINE ROTATIONAL SPEED AND HIGHER POWER OUTPUT IN A COMPATIBLE FASHION, AND REDUCING COSTS AND WEIGHT THEREOF. THE VALVE CONTROL (1) APPARATUS CONTROLS OPENING AND CLOSING OPERATIONS OF AN ENGINE VALVE. A CAM-TYPE VALVE ACTUATING MECHANISM ACTUATES (5) THE ENGINE VALVE (IV1, IV2, EV1, EV2) TO OPEN AND CLOSE THE ENGINE VALVE, BY A CAM WHICH IS DRIVEN IN SYNCHRONISM WITH ROTATION OF THE ENGINE. AN ACTUATOR MAKES BLOCKING ENGAGEMENT WITH THE ENGINE VALVE HAVING OPENED, TO THEREBY HOLD THE ENGINE VALVE IN AN OPEN STATE. AN ECU CONTROLS OPERATION OF THE ACTUATOR TO THEREBY CONTROL CLOSING TIMIMG OF THE ENGINE VALVE.(FIG 3) |
